Oil valve drain



May 12, 1931.

J. H. THIBEAULT OIL VALVE DRAIN Filed March 29, 1928 Patented May 12, 1931 UNITED STfiES Josnrn H. THIBEAULT, or wnnn nassacnusnrrrs OIL VALVE 31min Application filed March 29, 1928. stea 265,740.

The present invention relates to an oil valve drain for automobile crank cases. In accordance with the present practice, when the crank case of an internal combustion engine on an automobile is to be drained of oil, it is necessary to screw aplug out o the crank case. his operation renders it necessaryfor the operator to crawl under the vehicle, the plug frequently drops into an outlet opening alined with thebore;

the oil bucket therebelow andgenerally, the

process of draining a crank case'on an auto-';

mobile is inconvenient. I

The prime object of the invention is to provide means whereby the instrumentality of a rotary valve, the crank case of an automobile maybe conveniently drained without the ne'cessityof the operator crawlingbelow the vehicle but allowing the operator to merely use a long screw driver or the like to operate the rotary valve in a convenient manner from the side of the vehicle.

A further important object of the invention resides in the provision of arotary valve of this nature having means to prevent the osition due to jarring and vibration to which the crank case is subjected in actual practice.

A still further very important object of the invention resides in the provision of an oil valve drain of this nature which is exceedingly simple in its' construction, inexpensive to manufacture, and thoroughly efficient and reliable in use and operation.-

With the above and other objects in'view, which will appear as the descriptionproceeds, the invention resides in the combinaa bottom plan View thereof, longitudinal section through if. automobile. Incarrying out accidental operation of the valve to an open tion thereof.

Figure Axis a transverse'sec tion therethrough.

Referring to the drawing in detail it will;

. be seen that the numeral 1 denotes thecrank caseof an internal combustion engine-on an the invention there is provideda valve casing 2 havinga necks which is threaded into the crankcase 1; The neck 3 has a bore 4%, theicasing having c0 A valve 6 is mounted to rotate inithe casing 2 and'h'as a transverse port7v extending fltherethrough intermediate its ends. The bottom of the casing 2 at one end is provided with a notch 8 and a pin QeXtendsradialIy I from the adjacent end ofthe valve 6 for engaging in the notch 8. The; other end of the valve is providedwith an inwardly'extend ing longitudinal bore 10"for threadedly receiving-a shank 11 of atool engaging head 12. 7 i

' The head 12 in the present example of the invention is provided with slot 14: to receive 1 the blade'of a screw driver The shank 11 is locked inthe bore 10 by means .ofa pin 15.

A gasket 16 isdi'sposedabout the neck 3be- 5, tweenthe bottom of the crank case 1 and "aifiat shoulder 17 formed on the casing at its juncturewith said'neck. This gasket is of such thickness or may be duplicated so that V the valve also extends transversely of the en- 'gine' so that the head 12 twill-be accessible from one side'by means of a screw driver or l k tool. Y A" "A spring19- of the coil type I is disposed about the valve 6" and impinges againstth'e casing 2 and the tool engaging head 12 so as to hold, the pin 9. in the I notch 8' when the valveis closed. Therefore in order to open the valve r'or draining the oil from the crank case 1 it is necessary to engage the screw driver in the slot l land slide the valve slight- 1y longitudinally of its length to release the pin 9 from the notch 8 and then the-valve -may be rotated to register its port? with the bore 4 and opening 5.

Itis thought that the construction, opera tion, utility and advantages of this invention will now be quite apparent to those skilled in this art without a more detailed descrip- The present embodiment of the invention has been disclosed in detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of the invention and the above de scription. It will be apparent that changes in the details of construction, and in the combination and arrangement ofparts may be resorted to without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing'any of its-advantages. 7

Having thus described my invention, what I claim as new is: I r

1. In a device of the class described, a crank case, a casing having a neck threaded into. the lower portion of the crank case, a plug mounted to rotate in the casing and con trolling the flow of oil from the crank case through the casing, one end of the casing being formed with a notch, a pin radiating from the plugand engageable within the notch,

one endof theplug remote from the pin be ing provided with an inwardly directed threaded bore, a shank threaded in said bore, atool engaging head formed on the shank being of greater diameter than the plug to provide a shoulder,a spring disposed about the valve impinging against the shoulder provided by the head and the casing to hold the pin in the notch and lock the plug against casual displacement, and a pin in the plug extending into the shank for locking the shank against rotation in the bore.

2. An oil drain valve for crank cases comprising acasing adapted for threaded engagement with a wall of the crank case, a plug rotatablymounted in the casing for controlling the flow of oil from the crank case through the casing, said casing provided with a notch, said plug provided with a pin en- U gageable with the notch for normally retaining the plug against rotation, a shank thread: edly engaging said plug remote from said pin, a tool engaging head on the outer end of said shank, spring means disposed about said plug between said head and casing and engageablewith said head for yieldably retaining said pin in said notch, and means carried by said plug and engaging said shank for locking said shank against casual movement relative to said plug. V

In testimony whereof I afliX my signature.

' JOSEPH H.v THIBEAULT. 

